Power requirements in watts vs. speed & wheel rpm

I've done some figuring on power requirements and wheel speeds for these bikes. I believe quite a few on here have already done some of these figures, but I thought it may be helpful to list these for everyone. For me, still deciding on what to get, it was nice to get a "feel" for the power necessary as well as its' exponential nature.

Okay so these are all figured on a standard MTB frame 26" with no fancy handlebars (lol). Total weight used was 260lbs (190lbs rider / 70lbs bike). I believe this is a decent "rough" weight to go with, of course if total load was higher; power would go up as well. The efficiency of the drivetrain was figured at 85%, I believe this is conservative and only includes drive system not motor/ engine efficiency (e.g. shown watts = req'd Engine SHAFT power). Elevation was figured at 650ft.

Two additional key notes:
This is the power required to maintain X speed, not acceleration or coasting power.
Power was also figured using either 5mph head wind (low speed) or a 1% incline (higher speed). A rough average of those two powers is whats shown. The reason is that in "real world" conditions you will always have some kind of wind / grade attempting to reach these max speeds.

I'm thinking that the GP460 is just the Chung Yang version with a "Go-Ped" re-brand??

With a larger drive sprocket and better exhaust, my friend was able to push his Go-Ped Riot to AT LEAST 45, likely closer to 50... with only 9" or 10" wheels. That engine didn't last long, but he did it!.